seems like the common thing here is using remote play. If you were using remote play and banned, Comment below. I think that is the issue that shouldn't be a problem. It's not considered 3rd party and if it is, put it Clear as day in you TOS.
I did not do remote play. I hardly even bought cards in the Auction House lol. I 'flipped' a card the day before the ban, that's the only thing that I can think of. I made about 10k on buying and re-selling a Sellers lol. That's the only thing I can think of. Otherwise everything I sold in the AU was cards I pulled from packs that were purchased with my own fkin money.
